code: def unlink(filename):
      if os.path.exists(filename):
          os.unlink(filename)
  
file_path: vowpal_wabbit/test/save_resume_test.py
imports: import sys
  import os
  import optparse
  import random
  from itertools import zip_longest
label_desc: Use image node_id 3 for calling a global function with example usage: unlink(filename) without return types